/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import 'package:flutter/gestures.dart';
import 'package:flutter/widgets.dart';

/// For web, listens for mouse scroll events and adds dy
/// to the given controller.
///
/// Use this to scroll horizontal lists that would otherwise not scroll
/// because mouse wheel only scrolls vertically.
class WebScrollConverterWidget extends StatelessWidget {
  final Widget child;
  final ScrollController scrollController;

  const WebScrollConverterWidget({
    required this.child,
    required this.scrollController,
  });

  @override
  Widget build(BuildContext context) {
    return Listener(
      onPointerSignal: (pointerSignal) {
        if (pointerSignal is PointerScrollEvent) {
          final delta = pointerSignal.scrollDelta.dy;
          scrollController.position.animateTo(
            scrollController.position.pixels + delta,
            duration: const Duration(milliseconds: 100),
            curve: Curves.linear,
          );
        }
      },
      child: child,
    );
  }
}
